QoS constrained resource allocation for multimedia wireless networks

To deliver high bandwidth demanding video traffic over the resource limited wireless systems is becoming a challenge issue. To control quality of service (QoS) of the delivery is even more difficult. A QoS constrained multilevel resource allocation scheme (QML-RA) is proposed to tackle the problem of how to flexibly allocate wireless network resources for carrying video traffic with certain QoS guarantees. This scheme utilizes the layer property of MPEG frames and considers the QoS requirements of different data sections within a video stream. It also takes the advantage of the channel allocation flexibility provided by CDMA/TDD systems and statistically assigns bandwidth to video traffic according to their QoS requirements. Moreover, an optimal smoothing technique is used to preprocess the video traffic so that bit-rate variability could be reduced, which enhances performance of QML-RA. The scheme significantly improves the channel utilization and increases the network throughput.